53
4) Power up the computer.
5) Power up the Sonar Processor
after
the computer has booted up (the computer will not properly
boot up if the Sonar Processor is powered up)
The procedure below provides an example on how to record a file and will step you through some of
the recording options. The complete system needs to be cabled up and ready to go.
1. Open the SONAR VIEW application. To begin select Monitor Mode on the Standard toolbar at
the bottom of the screen (make sure the Standard Toolbar and Control Toolbar has been checked
under VIEW in the Top Toolbar ). Monitor Mode will allow you to view the side scan data but not
to record it. Recording will come later (step 8).
2. Select the frequency of the Fish under “Settings”. If it is a dual frequency fish, select 600Khz. The
higher frequency gives a better quality image on the short ranges.
3. Select a scan range under “Range” on the control toolbar at the bottom of the screen. There are
11 range settings (for 100Khz Fish) between 5 and 600 meters. Longer range settings allow a
larger area to be scanned, but the resolution of the scan is lower. Shorter range settings pro-
duce higher resolution images (if 600Khz fish) and are recommended when searching for small
or “soft” targets. For this exercise select 25 meters.
4. Select a Boat Speed under “Boat Speed” on the control toolbar. The boat speed selected should
be close to the actual speed of the boat (for correct aspect ratio of the image on the display).
When towing, the slower the actual boat tow speed (1-3 kt) the better the image. If the GPS
connected to the computer outputs a speed, select “AUTO” from the boat speed box on the
screen.
5. Select a screen color under “Colors” on the control toolbar. The color combinations allow the
sonar image to be displayed in various shades of both colors. The best color is a matter of
operator preference although at times a sonar image can appear to be more distinct in one
particular color. For this exercise select Bronze from the Colors list. A zero return will display
black and the hardest return will display white. The water column (distance off bottom) will be
black (no signal return) with this Color selected.
6. Make a preliminary setting of the Gain Controls (TVG) on the Sonar Processor box (not on the
software). Start with all three gain controls (for each channel) full counter clockwise. Adjust the
Overall Gain to 5 then start turning up the Near Gain until the image is clearly displayed. Lastly
adjust the Far Gain control for a balanced image across the display.
While making the TVG adjustments, observe the Analog Signal Display below each channel
(see page 27 for location). When the TVG is properly adjusted the overall baseline of the dis-
played signal will be somewhat flat and in the lower center area of the screen. A typical TVG
adjustment setting for the 25 m range would be: Near 4
1/2
, Far 7, and Overall 5
1/2
.
Note: When recording, it is important to have the Gains properly adjusted. If a file is recorded
with the Gains set too high, causing the signal to “saturate” the amplifier, detail lost in the satu-
rated portion of the image cannot be recovered in playback. It would be preferable to have the
Overall Gains set slightly too low; the Gains can be increased by the on-screen Gain Control
SAMPLE RECORDING
(continued)
Содержание SSS-100K PC
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